#include <bits/stdc++.h>
using namespace std;
#define int long long
void solve()
{
    int n;
    cin>>n;
    vector<int>v(n+1);
    for(int i=1;i<=n;i++)
    {
        cin>>v[i];
    }
    int ans=1;
    for(int i=2;i<=n;i++)
    {
        if(v[i]-v[i-1]>1)ans++;
        else v[i]=v[i-1];
    }
    cout<<ans<<endl;
}
signed main()
{
    //ios::sync_with_stdio(false);
    //cin.tie(nullptr);
    int T=1;
    cin>>T;
    while(T--)
    {
       solve();
    }
    return 0;
}